Malicious PDF — malware analysis report

Static analysis result for SHA-256 c159f7a8d1294a91…

MALICIOUS

PDF

54.3 KB Created: 2020-10-15 15:03:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 8b4de5e04d65cc7135bd56f45fbff8c3 SHA-1: cad0b15ba631b05786cfc51b39d4c82ae196d96a SHA-256: c159f7a8d1294a9107b0cf47b41a17197c22015c6dfdc89e859bade0f41f7da8
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ggtraff.ru/123?keyword=feedback+amplifiers+notes+pdf In PDF document text
    • https://zesopupejilit.weebly.com/uploads/1/3/0/7/130738861/6533331.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/kopiwu_gotatumeturi_bovejixegas_vivikow.pdfIn PDF document text
    • https://wovasemuzusalej.weebly.com/uploads/1/3/1/6/131636629/3167199.pdfIn PDF document text
    • https://derodaju.weebly.com/uploads/1/3/1/6/131606282/e8597.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365570/normal_5f87028c91605.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366317/normal_5f87a6a977b10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369324/normal_5f87b2de88010.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365621/normal_5f86fc62d4ea6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365662/normal_5f87312a823ad.pdfIn PDF document text
    • https://lodirunesu.weebly.com/uploads/1/3/0/8/130874391/zesukufodak.pdfIn PDF document text
    • https://tivakoxidedopa.weebly.com/uploads/1/3/0/7/130776298/wenezukawoziwevekefe.pdfIn PDF document text
    • https://mivosubewo.weebly.com/uploads/1/3/1/4/131407796/damozatabases.pdfIn PDF document text
    • https://xojisige.weebly.com/uploads/1/3/1/6/131637148/5470614.pdfIn PDF document text
    • https://kagilovudugavap.weebly.com/uploads/1/3/1/1/131164538/bexul.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/cebd8ba4-84d1-4066-bfb4-28b9ffff6ef6/942224978.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe2d3850-b262-4e62-a937-c87a2847dcf5/ridadinupokolozabedudo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9224b794-a9d7-4457-8dfa-cd49a478f29e/91569695090.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4a37b98-9c81-4b90-add1-510cd0e0fbfb/42972842838.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/583e6e8a-92fd-47a0-a3dc-f9b644a29b24/vojunupeduzupivazegi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/024b6ed2-9c43-4dd4-90e1-9f2b068ad0f3/49222777493.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33850d7f-26b2-4f7c-ba05-95eac265ba76/55801871135.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6dba568-2521-42fd-84f4-b407d9084838/24569676216.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cc73dde-7f6f-4a34-b3cf-3a45920888cf/lesitufe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/481a876f-df65-481c-a1bd-38f529c6b5e4/nogugaxokolafilirozazoxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bece340f-d13c-4ced-95fd-b5fda1f24503/93921781794.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63ea7a7a-f210-4ae0-8bfb-9d92b4817dbe/dolijupibewobipiluzonuli.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000093fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93FB 5460 bytes
SHA-256: cb94e95b7e27320fa0c3ed65e3317f4f92338c8c36eb7aadee9d940593b63a7b
font_01_sfnt_off0000a676.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA676 10708 bytes
SHA-256: 46d7f54250c205d56c9c630b99d6478ced2a774e42106a3c8ee21a6d6e1ba813